Locking device for motor vehicles



Dec. 8 1925. 1,564 220 r A. DUMAS LOCKING DEVICE FOR MOTOR VEHICLES Filed March 14, 1924 Inventor Attbrney Patented Dec. 8, 1925.

UNITED STATES PATENT OFFICE.

ALBERT DUMAS, OF SOREL, QUEBEC, CANADA, ASSIGNOB TO DUMAS TRANSMISSION LOCK & MACHINERY COMPANY LIMITED, OF

CANADA.

Application filed March 14, 1924.

To all whom it may concern:

Be it known that I, ALBERT Dumas, a subject of the King of Great Britain, residing at Sorel, Province of Quebec, Canada, have invented certain new and useful Improvements in Looking Devices for Motor Vehicles; and I do hereby declare that the following is a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present invention pertains to a looking device for motor vehicles and resides in a modification of the construction shown in my pending United States application Serial No. 646,276. filed June 18th. 1923.

The principal object of the invention is the provision of a device which may lock the transmission mechanism of an automobile either absolutely or in such a manner that the vehicle may be moved from place to place by pushing. It is desirable to lock the vehicle in this manner when, for example, it is in a garage.

The invention is ada 'itable particularly to automobiles constructed with shifter rods. In order to accomplish the obiects of the invention. the shifter rods are provided with grooved collars. The locking mechanism comprises a slidable member adapted for reception in the grooves of the collars. \Vhen the slidable member is in this position, the

vehicle may be pushed from place to place but it cannot be successfully driven since the speed changing mechanism is obstructed.

The slidable member carries a toothed member which engages one of the transmission gears when the slidable member is moved farther into the grooves of the col lars. The tooth member thus locks the vehicle absolutely against movement.

The invention further includes a construc-' tion for locking the slidable member in adjusted positions, so that only the speed changing mechanism is obstructed or so that both this mechanism and the gear are looked, as desired.

The invention is fully disclosed in the following description and in the accompanying drawings in which:

Figure 1 is a sectional view, partly in elevation, of the device in open position;

LOCKING DEVICE FOR MOTOR VEHICLES.

ST. JOSEPH DE SOREL, QUEBEC,

Serial No. 689,320.

Figure 2 is a similar view showing the de- -vice in locking position;

is of substantially cylindrical configuration,

having also an extended portion 3 for containmg a lock. The latter is indicated by the key 4- and bolt 5 thereof. As will be seen from Figures 1 and 2, the bolt is adapted to extend into the interior of the housing 1.

The housing contains a cylindri 'al plunger G-having a central longitudinal cavity 7. The plunger is formed with a pair of recesses 8 and 9 adapted to receive the bolt 5 of the lock. Opposite the recesses are formed small notches 10 adapted to receive a spring pressed ball 11 contained in the wall of the housing 1. The notches are so arranged with reference to the'recesses S and 9 that one ofthem receives the ball when the bolt 5 is projected into one of the recesses or lies on the top of the slidable plunger (S.

The cavity 7 of the plunger contains a slidable stem 12 formed with a tooth 13 at its lower end. The stem is recessed from its upper end as at 14 wherein is contained a spring 15 hearing against the upper end of the plunger 6. The inner wall of the plunger is formed with a slot 16 receiving a pin 17 extending from the stem 12. Due to this construction, the stem 12 is prevented from rotating relatively with the plunger.

The mechanism thus far described is so arranged that it lies slightly above the spaced shifter rods 18. In accordance with the invention each of these rods has fixed thereto a collar 19 formed with a groove 20. At the lower end of the plunger 6 is provided an extension 21 adapted to move between the collars 19 and the sides of which are receivable in the grooves 20. Beneath the rods 13 is disposed the usual reverse and low speed sliding gear 22. The stem 12 is so arranged with reference to this gear that the tooth 13 is adapted for reception between the gear teeth as shown in Figure 4. Itis also to be noted that the'tooth 1'3 is 'of such size that it may pass between the collars 19 as is apparent from Figures 3, l-a'nd5.

To the top of the plunger 7 is secured a finger 23 extending through the top of the housing 1 and provided at--its uppe-1- encl with a headQet. The finger is surrounded by a spring 25 hearing against the lower-"surface of the head and the topof the housing. 'lo'the' top of the housing is also-secured apair of ears 26 between whichis pivoted a lover 27 adapted to engage the under side of the head.

In Figure l thefdevice is illustrated with the-locking 1116dh2i1'1'isn1 raised so" that it does not interfere with thegpropellinggear of the vehicle. When it is desired to look thevehicle'absolutely against movei'nent the lock bolt 5 is withdrawn-fromthe interior of the ho-using and the plunger 6 5 pushed down as jf ar'ajspossible'by foot pressure on the head 24. The bolt is now projected again into the interior ofthefhousing whereby itse-rves to stop upward movement of the slidable parts 'due'tot-he action of thespring25. In this'lowei'ed position, the extension 20 is received in thegrooves of the collars 19 and thetooth Blocks the gear Under certain conditions it is desired to lock the vehicle in such a manner't-hat it cannot be driven,butstill maybe moved from place to placeas in a garage. In order to'provido for this situation, the'n'i'o'vable parts are so arranged that'the extension 21 may be'recei've'd in the gro'ow'es'oi the collars 19 whilethe tooth 13"is free'irom the: gear To adjust the device in this manner, the bolt 5 is Withdrawn from the interior of the housing and the'p'IungerG is moved downwardly until the recess 8 is disposed to receivethe bolt. The latter is then projected into the recess 8, whereby the entension 21 and tooth l3 assume the position shown 1n Flgure 5. Since the extension 21 is received in the groovesot the-collars 19,

the "speed of the vehiclecannot bechanged an'dtherefore cannot be successfully driven by anunauthorized :person. At the same time it 1s )ossrble to ush the car from place to place since the tooth 13 18 free from the ge -(11 22.

It is often diflicult to remove the tooth l'i'lfl'OIH t-l'w gear due to the wedging efiect caused by the tendency oi the gear to move against the tooth. In such av case, the tooth may be pulled out of the gear by a "sharp blow struck by the foot on the lever 27 which acts to shift the entire slid-able mechanism.

While a "specific einbodinientof the invention 'hasbeen illustrated and described, it is'to be understood that various ailterati'onsin'the details of eons'tructio'n may be made without departing fromlthesp'irit of 'thein'vention asindicated by the'appe'nde'd fotthe ro'ds, a locking device disposed at the other side or the rods and COITIPIlSlIlg a sl'rdable member adapted for locking engageinent with said rods, a" toothed member carried by said shdable member and adapted forengagement with said "gear, sa d shdable and toothed members being substantially coextensive towards the rods,"a:ndmeans for locking -said sli'dable 'member in adjusted po's'itions,' whereby the slidable member may beenga ge'dwith the rods independently of the engagement between the toothed member "and the gear.

In wit-nesswhereofl have hereunto set my ALBERT DUMAS.

hand. 

